TrmB protein can bind to the promoter region of malE gene,trehalose can bind to trmB protein.In the presence of trehalose, the binding of trmB protein to male gene was inhibited and the malE gene was transcribed.So we can know that trmb protein is a()?
A. Inducer
B. Positive control protein
C. Operon
D. Repressor
E. Repressor gene
查看答案
The following repair methods only work when pyrimidine dimer is produced()
A. Photoreactivation repair
B. Excision repair
C. Recombination repair
D. SOS repair
E. Mismatch repair
Which technologies will not be used in the Southern blot?()
A. Restriction digestion
B. Marker probe
C. Sequencing primer
D. Electrophoresis
E. Filter paper (nitrocellulose)
Which of the follwing factor helps the aminoacyl-tRNA enter into A site of ribosome:()
A. EF-G
B. EF-Tu
C. IF2
D. EF-TS
The binding of miRNA to target mRNA depends on:()
A. Drosha
B. PKA
C. RISC
D. siRNA
微信支付 
支付宝支付